NEAR MSI Deblurred Images
he Near Earth Asteroid Rendezvous – Shoemaker (NEAR; Cheng et al., 1997) spacecraft orbited and studied the surface of asteroid (433) Eros for a year from 14 February 2000 to 12 February 2001. Eros is a near-Earth S-type asteroid; it is approximately 34 km long with an 11×11 km cross-section. NEAR was the first mission to observe an asteroid from orbit and provided a broad dataset characterizing Eros’s surface in unprecedented detail. Unfortunately, prior to these observations, during a failed orbit insertion maneuver on 20 December 1998, the NEAR thrusters expelled >28 kg of hydrazine fuel on to the spacecraft. Some fraction of this volume was deposited on to the outer optical surface of the NEAR Multispectral Imager (MSI), causing spectrally-dependent blurring for all of MSI’s filters.
Due to contamination on the outer optic of the NEAR-Shoemaker MSI, all surface-resolved images of Eros acquired by MSI had wavelength-dependent degradation. The MSI team designed and implemented a preliminary correction for the blur during mission operations and archived the results with the original camera data. While extremely successful, the preliminary correction was less effective for the 450 and 1100 nm passbands. Here we implement a new correction, based on the MSI team’s original process, to improve the blur remediation for all MSI filters, particularly those at the extreme wavelengths. The new method improves the effective resolution of the deblurred images over the preliminary remediation for all filters. Moreover, for all filters, our method preserves the 21-39 percent of the pixels that were lost (or obscured by artifacts) with the preliminary remediation. We apply the new method to the complete MSI dataset of resolved Eros images and archive the results for future scientific use.
DOI: 10.17189/sv8w-5125
Access instructions: currently this archive is available from an Amazon S3 bucket.
To access that please find the listing for each file above (or from this index.html listing). Example Amazon aws command-line options for listing or downloading this archive
Listing the archive:
aws s3 ls --no-sign-request --recursive s3://asc-pds-individual-investigations/nearmsi.gbl_golish_2023/
to copy the whole archive (to test, add --dryrun to command-line):
aws s3 sync --no-sign-request s3://asc-pds-individual-investigations/nearmsi.gbl_golish_2023/ /my/local/path/.
References:
Golish, D.R., DellaGiustina, D.N., Becker, K.J., Bennett, C.A., Robinson, M., Crombie, M.K., Blur remediation in NEAR MSI images, Icarus, Volume 400, 2023, 115536, ISSN 0019-1035, https://doi.org/10.1016/j.icarus.2023.115536.
Cheng, A.F., Santo, A.G., Heeres, K.J., Landshof, J.A., Farquhar, R.W., Gold, R.E., Lee, S.C., 1997. Near-Earth Asteroid Rendezvous: Mission overview. JGRE 102, 23695–23708.https://doi.org/10.1029/96JE03364.
- Publisher
- Lunar and Planetary Laboratory, University of Arizona
- Publication Date
- 26 May 2023
- Originator
- Golish, D.R., DellaGiustina, D.N., Bennett, C.A., Becker, K.J.
- Group
- PDS
- Added to Astropedia
- 26 May 2023
- Modified
- 26 May 2023
General
- Geospatial Data Presentation Form
- Image, Raster Data, Remote-sensing Data
- Online Linkage
- https://asc-pds-individual-investigations.s3.us-west-2.amazonaws.com/nearmsi.gbl_golish_2023/index.html
- Color
- Black and White
- Supplemental Information
- https://doi.org/10.1016/j.icarus.2023.115536, https://pds-smallbodies.astro.umd.edu/data_sb/missions/near/index.shtml
Keywords
- System
- Small Bodies
- Target
- Eros
- Theme
- Asteroids, Image Processing, Remote Sensing
- Mission
- NEAR
- Mission Specific
- Multispectral Imager (MSI)
- Search Terms
- Eros, Asteroids, Image processing
Contact and Distribution
- Access Constraints
- None
- Access Instructions
- See S3 download instructions above
- Use Constraints
- Please cite authors
Data Status and Quality
- Time Period of Content Begin
- 14 February 2000
- Time Period of Content End
- 12 February 2001
- Currentness Reference
- Ground condition
- Progress
- Complete
- Update Frequency
- None planned
- Process Date
- 8 August 2022
Lineage
- PDS Status
- PDS 4 Archived
- Source Originator
- Planetary Data System
- Source Title
- Near Earth Asteroid Rendezvous (NEAR) Data Archive
- Source Online Linkage
- https://pds-smallbodies.astro.umd.edu/data_sb/missions/near/index.shtml
- Type of Source Media
- Online
Geospatial Information
- Direct Spatial Reference Method
- Raster
- Object Type
- Pixel
- Bit Type
- 32
